body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.my_width {
    width: 350px;
    height: 650px;
}


/* 间隙width: 90% */

.my_padding {
    padding: 0 10px;
    box-sizing: border-box;
}

a {
    user-select: none;
    text-decoration: none;
    cursor: pointer;
}

:root {
    --theme-color: #fff;
}

input {
    outline: none;
    border: none;
}

button {
    border: none;
}

ul {
    margin: 0;
    padding: 0;
}

li {
    list-style: none;
}

.title {
    margin-bottom: 0;
    font-size: 21px;
}

.mytitle_explain {
    margin-top: 5px;
    /* margin-top: 0; */
    font-size: 12px;
    opacity: .7;
}

footer {
    display: flex;
    justify-content: space-evenly;
    border-top: 1px solid #eee;
    width: 350px;
}

footer .share_delete {
    padding: 10px;
    display: flex;
    justify-content: space-evenly;
    width: 100%;
}

footer a {
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer_active {
    color: #f20c00;
}

@media screen and (max-width: 479px) {
    body {
        display: block;
    }
    .my_width {
        width: auto;
        height: auto;
    }
    footer {
        width: 100%;
    }
    .bar-router {
        position: fixed;
        left: 0;
        bottom: 0;
        z-index: 20;
        background-color: #fff;
    }
    .my_height {
        height: 100vh;
    }
    footer .share_delete {
        position: fixed;
        bottom: 70px;
        left: 0;
        border-top: 1px solid #eee;
    }
}